MILYAS. 247 
Hight examples of the typical form and one of the variety. Easily separable fro 
all the other species of the genus by the simply tuberculate or nodose lateral angles 
of the pronotum, the pronotum with its basal margin strongly bisinuate in the middle. 
In the Chihuahua specimen there are four pale spots extending across the posterior 
lobe of the pronotum in front and five others along the basal margin. 
Allied to the North-American M. cinctus (Fabr.), but with the tooth at the lateral 
angles of the pronotum very short or obsolete, the base of the latter strongly bisinuate 
opposite the scutellum, &c. 
5. Milyas zebra. (Tab. XV. figg. 5,3; 5a, last genital segment,3; 6, 6, 
7, 3, vars.) 
Milyas zebra, Stal, Stett. ent. Zeit. 1862, p. 448°; Enum. Hemipt. i. p. 87°; Uhler, Bull. U.S. 
Geol. & Geogr. Surv. i. p. 328°; Proc. Calif. Acad. Sci. (2) iv. p. 283 *. 
Harpactor cinctus, Walk. Cat. Hemipt. Heteropt. vili. p. 97 (part.) °. 
Hab. Nortu America, Upper® and Lower California 4.— Mexico!?? (Bilimek, in 
Mus. Vind. Cws.; Sallé), Chilpancingo and Amula in Guerrero, Cuernavaca in Morelos 
(H. H. Smith), Orizaba (Mus. Brit.°; H. H. Smith), Jalapa (Godman), Mexico city 
(Schumann), Oaxaca (Mus. Brit. 5). 
Var. a. Posterior lobe of the pronotum black, with two large spots on the disc, the sides in front, and the basal 
margin, a space towards the sides excepted, stramineous. (¢ 2.) (Fig. 6.) 
Hab. Mexico, Milpas in Durango, Xautipa and Xucumanatlan in Guerrero 
(H. H. Smith). 
Var. 3. The anterior lobe of the pronotum narrowly variegated with black or entirely pale, the lateral spines, 
and sometimes a spot or streak behind them, black; the elytra testaceous; the legs narrowly annulated 
with black ; the tooth at the lateral angles of the pronotum pointed at the tip. (d 9.) 
Hab. Guatemaua, Aceituno (Salvin), San Juan and San Gerénimo in Vera Paz, 
Guatemala city, Las Mercedes (Champion); Honpuras (Wittkugel, in Mus. Vind. Ces.). 
Var. y. The anterior lobe of the pronotum narrowly variegated with black, the posterior lobe with the lateral 
teeth, a streak behind them, and sometimes a spot on each side of the disc before the base, black; the 
elytra testaceous ; the tooth at the lateral angles of the pronotum blunt at the tip. (cd @.) (Fig. 7.) 
Hab. Panama, Volcan de Chiriqui (Champion). 
A common Central-American insect, separable in all its varieties from the North- 
American M. cinctus (Fabr.) by the longer and deeper sulcus on the disc of the 
pronotum, and the sulcate spine at the apex of the last genital segment in the males. 
The markings on the pronotum are variable, the black sometimes (in the typical form 
and in the var. «) predominating so as to enclose pale spots on the posterior lobe, 
and sometimes becoming almost obsolete; the lateral teeth are, however, always black. 
The second pale ring on the first antennal joint is frequently obsolete or indistinct. 
The posterior lobe of the pronotum, except at the base, the scutellum, and connexivum 
are often suffused with red. The pleura and the sides of the venter are each marked 
